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https://issues.apache.org/jira/browse/AURORA-1722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341407#comment-15341407
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Stephan Erb commented on AURORA-1722:
-------------------------------------

Thinking about it, the proposed flag {{limit_per_instance}} could mean 
different things to different people:

a) only return status updates for the given instance id
b) return status updates for all instances, but limit the number of status 
update per instance to the given number

What exactly is your intention here? I kind of thought you wanted b) and 
therefore inferred that you'd need sorting.

> Add new field to TaskQuery to allow querying latest statuses grouped by 
> instance id
> -----------------------------------------------------------------------------------
>
>                 Key: AURORA-1722
>                 URL: https://issues.apache.org/jira/browse/AURORA-1722
>             Project: Aurora
>          Issue Type: Task
>          Components: Scheduler
>    Affects Versions: 0.16.0
>            Reporter: Igor Morozov
>
> Currently in order to get the status of all job instances both failed and 
> running one needs to issue a query for all task statuses, then group them by 
> instance id and sort by timestamp to get the lastest statuses per instance. 
> For tasks with a lot of churn that may cause unnecessary transferring huge 
> blobs of thrifts. 
> The proposal is to include new member into TaskQuery struct
> struct TaskQuery {
> ...
>   14: i32 limit_per_instance
> }



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